2. Creative Commons Attribution 3.0
Kane Mar and Others (see credits)
You are free:
to Share — to copy, distribute and transmit the work
to Remix — to adapt the work
Under the following conditions:
Attribution. You must attribute the work in the manner
specified by the author or licensor (but not in any way that
suggests that they endorse you or your use of the work)
http://creativecommons.org/licenses/by/3.0/
7. Relative Estimates
Points are abstract representations of size,
which includes complexity, effort etc.
Scales currently used:
Fibonacci Scale: 1, 2, 3, 5, 8, 13 ...
Linear Scales: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10
T-shirt sizes: XS, S, M, L, XL
8. Relatives Estimates
Points do not have units
Points are not related (easily) to hours or
days
What use are relative estimates if we don’t
have a time or duration associated with
them?
How can we use an abstract concept to
derive durations and timeframes?
9. Exercise: Relative
Estimates
We use an abstract concept to enable
transactions for goods and services every
single day.
We define the value of a dollar (“fiat
money”) by how much “stuff” we can buy
with it
14. Exercise: Relative
Estimates
This is a Runeberg
Tart. It’s named after
the Finnish national
poet Johan Ludvig
Runeberg (1804 -
1877) who, according
to the legend,
enjoyed the tart with
punch
15. Context is important
Context is important when estimating with
relative sizing
The relevance of a Point is very, very local
Comparing points between teams has very
little meaning (although it is possible with
additional effort)
16. Relative Estimates
Estimating with Points is fast
Points can be easy to explain and
communicated
They allow us to deal with ambiguity
The whole team is involved with estimation
22. References
“Agile Software Development with Scrum,”
Ken Schwaber and Mike Beedle, 2001
“Agile Project Management with Scrum”, Ken
Schwaber
“Scrum and the Enterprise”, Ken Schwaber
“Scrum in 5 minutes”, Softhouse Nordic AB
http://www.softhouse.se/Uploades/Scrum_eng_webb.pdf